第一阶段迁移已完成。

已实现：
ASP.NET Core 10 分层解决方案：[Eis.slnx](C:/Users/BI/Documents/EIS-dotnet/Eis.slnx)
ASP.NET Core 统一入口与健康检查：[Program.cs](C:/Users/BI/Documents/EIS-dotnet/src/Eis.Web/Program.cs)
原前端静态资源无修改托管
未迁移 API 自动转发至旧 Node 服务，兼容 JSON、Cookie、请求体和文件下载
可重复执行的端到端测试：[smoke-dotnet-migration.ps1](C:/Users/BI/Documents/EIS-dotnet/scripts/smoke-dotnet-migration.ps1)
迁移进度与运行说明：[MIGRATION.md](C:/Users/BI/Documents/EIS-dotnet/MIGRATION.md)
验证结果：

.gitignore

@@ -7,3 +7,7 @@ node_modules/
 .env
 .env.docker
 *.log
+**/bin/
+**/obj/
+.vs/
+artifacts/

Directory.Build.props

@@ -0,0 +1,9 @@
+<Project>
+  <PropertyGroup>
+    <LangVersion>latest</LangVersion>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <AnalysisLevel>latest</AnalysisLevel>
+  </PropertyGroup>
+</Project>

Eis.slnx

@@ -0,0 +1,8 @@
+<Solution>
+  <Folder Name="/src/">
+    <Project Path="src/Eis.Application/Eis.Application.csproj" />
+    <Project Path="src/Eis.Domain/Eis.Domain.csproj" />
+    <Project Path="src/Eis.Infrastructure/Eis.Infrastructure.csproj" />
+    <Project Path="src/Eis.Web/Eis.Web.csproj" />
+  </Folder>
+</Solution>